Energy storage electrodes and devices
a technology of energy storage electrodes and electrodes, applied in the field of energy storage electrodes and devices, can solve the problems of inability to prepare electrode films thinner than several tens of microns, inability to improve electrochemical performance characteristics, and inability to achieve additional room for improving electrochemical performance characteristics, etc., to achieve the effect of convenient management and processing
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example 1
Supercapacitor Electrode Preparation
[0028]A Ni mesh (3×6 cm2, opening 2 microns, wire diameter 2 microns) was cleaned by soaking and sonicating in 50% isopropyl alcohol (IPA) for 16 hrs, and dried in an oven at 120° C. for 1 hr. The mesh sample was clamped with four Al spacer bars (0.5 cm×0.5 cm×5 cm) at the two ends of the rectangular mesh and suspended on top of an Al plate (5×5 cm2) using 4 small screws at each of the four corners of the square Al plate. The suspended mesh on Al plate was placed on a spin coater.
[0029]A supercapacitor electrode precursor solution was prepared by slow addition of 5 wt % of RuCl3 in IPA to an aqueous graphene oxide solution (4 wt %, Sigma-Aldrich). The solution was diluted with IPA to allow approximately 1:1 water to IPA ratio by weight. The RuCl3 to graphene oxide ratio may vary from 0 wt % to 10 wt %.
[0030]The precursor solution was added onto the surface of the mesh that was suspended on top of the Al plate and placed on a spin-coater. The precu...
example 2
[0036]A Cu mesh (3×6 cm2, opening 2 microns, wire diameter 2 microns) was cleaned by soaking and sonicating in 50% isopropyl alcohol (IPA) for 16 hrs, and dried in an oven at 120° C. for 1 hr. The mesh sample was clamped with four Al spacer bars (0.5 cm×0.5 cm×5 cm) at the two ends of the rectangular mesh and suspended on top of an Al plate (5×5 cm2) using 4 small screws at each of the four corners of the square Al plate. The suspended mesh on Al plate was placed on a spin coater.
[0037]The supercapacitor electrode precursor solution described in EXAMPLE 1 with 0 wt % RuCl3 concentration was used as the Li-ion anode precursor solution. Again, the precursor solution was added onto the surface of the mesh that was suspended on top of the Al plate and placed on a spin-coater. The precursor solution was allowed to conditioning for 30 seconds, permitting complete wetting on both sides of the mesh, followed by spin at 1200 rpm for 20 seconds. The coating was dried i...
example 3
[0040]A Ni mesh was cleaned, suspended and placed on a spin coater as described in EXAMPLE 1 and ready for subsequent spin-coating. A LiCoO2 precursor solution was prepared as follow: A solution of lithium acetate, (Li(CH3COO)2.2H2O, 5.10 g, 0.05 mol, in 50 mL 50%) was mixed with a solution of cobalt acetate, (Co(CH3COO)2.4H2O, 12.55 g, 0.05 mol in 50 mL 50% IPA) and poly(ethylene glycol) (8.80 g, 0.2 mol) in a 250-mL flask at room temperature. The resulting pink-colored solution was heated under reflux for 6 hrs and cooled to room temperature ready for subsequent spin-coating.
[0041]The precursor solution was added onto the surface of the mesh that was suspended on top of the Al plate and placed on a spin-coater. The precursor solution was allowed to conditioning for 30 seconds, permitting complete wetting on both sides of the mesh, followed by spin at 1200 rpm for 20 seconds. The coating was dried in air at 160° C. for 16 hrs first followed by heating at 4...
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